Air treatment device



FIG. 1 is a perspective view of the air treatment device;

FIG. 2 is a front elevation view of the air treatment device;

FIG. 3 is a rear elevation view of the air treatment device;

FIG. 4 is a left side elevation view of the air treatment device;

FIG. 5 is a right side elevation view of the air treatment device;

FIG. 6 is a top plan view of the air treatment device; and,

FIG. 7 is a bottom plan view of the air treatment device.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an air treatment device, as shown and described. 